app.js

const cheerio=require('cheerio');
const request = require('request');
var args = process.argv;

//node app.js -u https://www.naturesbasket.co.in/Products/Taaza---Homogenised-Toned-Milk---Amul/200_0_0_0
//node app.js -u https://grofers.com/prn/maggi-masala-noodles/prid/169812
//node app.js -u https://www.bigbasket.com/pd/100006283/premier-special-face-tissue-100-pcs/


var scrapeGBN= function(url,callback){
    
    if(!url){
        msg("Please give URL")
        callback && callback("Please give URL",null)
    }else if(!url.match("grofers.com") && !url.match("bigbasket.com") && !url.match("naturesbasket.co.in") ){
        
        info();
        callback && callback("Websites supported for scraping - BigBasket, Grofers and Natures Basket",null)
    }else{
        try {
            var options = {
                headers: {'user-agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.107 Safari/537.36'},
                method: 'GET'
            }
            request(url, options, function(err, response, html){
              if(!err){
                var $= cheerio.load(html);
                var json={}
                
                if(url.match("grofers.com")){
                    var name= $('.pdp-product__name').text()
                    var desc=$('.product-attribute__attr--description').text()
                    var price=$('.pdp-product__price--new').text()
                    var size=$('.product-variant__btn--active').text()
                      
                    json['name']=name
                    json['description']=desc
                    json['price']=price
                    json['size']=size
                    msg(json)
                    callback && callback(null,json)
                }else if(url.match("bigbasket.com")){
                    var name= $('h1').text()
                    var desc=$('._26MFu').children().eq(1).find('p').text()
                    var price=$('.IyLvo').text()
                    var size=$('._3Yybm').text()
                    
                        json['name']=name
                        json['description']=desc
                        json['price']=price
                        json['size']=size
        
                        msg(json)
                        callback && callback(null,json)
                }else if(url.match("naturesbasket.co.in")){
                    var name= $('.pd_Title').text()
                    var desc=$('#divShortDesc').text()
                    var price=$('.search_PSellingP').text()
                    var image=$('#impProductsImage').attr("src")
                    
                        json['name']=name
                        json['description']=desc
                        json['price']=price
                        json['image']=image
        
                        msg(json)
                        callback && callback(null,json)
                }
            
             }else{
            
                msg("Oops something went wrong")
                callback && callback("Oops something went wrong",null)
            }})
         
        }catch(err){
            msg("Oops something went wrong")
            callback && callback("Oops something went wrong",null)
        }
    }

    
}
 
var msg=function(message){
    if (require.main === module) {
    console.log(message)
    }
}      
function argsCheck() {
    //console.log(args)
    if (args.length < 3 || (args.indexOf('-url') < 0 &&
            args.indexOf('-u') < 0)) {
        info();
        return;
    }else{
        var indx = args.indexOf('-url');
        var indx2 = args.indexOf('-u');
        
            if(indx>=2){
                //console.log(indx+" : "+args[indx + 1])
                scrapeGBN(args[indx + 1]);
            }else if(indx2>=2){
                //console.log(indx2+" : "+args[indx2 + 1])
                scrapeGBN(args[indx2 + 1]);
            }else{
                info();
            }
    }
    
}

if (require.main === module) {
    argsCheck();
    
}

function info() {
    if (require.main === module) {
    console.log("Websites supported for scraping - BigBasket, Grofers and Natures Basket");
    console.log("Command to run this npm");
    console.log("node app.js -u Your-URL-String OR -url Your-URL-String");
    }
}

module.exports = {
    webscrape : scrapeGBN
};